I have recently been involved in a serious discussion with the Frogs, who believe their mother is the night and their fathers are the constellations, regarding their considerations of the impossible versus the improbable. We do not agree.
My personal opinion is that surrealism lies outside of reality, absurdity lies within reality but outside of logic (such as the existence of mules or placebos) and insanity lies opposite to, or on the contradictory side of, reality.
The opinion of the Frogs is that everything is reality, absurdity is inevitable and is the natural outcome of total awareness due to the nature of quantum leaps, warps and worm holes, force fields, perceptions, connections, reincarnations, explanations and adaptations to the convoluted evolution of the expanding universe and insanity is the inevitable result of inventing too many words (such as incomprehensible, incongruous, irrational, irreconcilable, irresponsible, irrepressible, inconceivable, unbelievable, unpredictable, irregular, irrelevant, irreverent and nonsensical).